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1、东海浮游翼足类（pteropods）种类组成和多样性研究生物多样性2005,13(2):168—173BiodiversityScience?研究简报●东海浮游翼足类(pteropods)种类组成和多样性研究徐兆礼(农业部海洋与河口渔业重点开放实验室,中国水产科学研究院东海水产研究所,上海200090)摘要:根据1997—2000年东海23.30一33.00N,118.30一128.00E海域四季调查资料,运用定量,定性方法探讨了东海浮游翼足类种类组成,种类数,物种多样性指数(H)及其与环境因子的关系.结果表明:四季中共出现翼足类21种,其中尖笔帽螺(Creseisacicu
2、la),马蹄搋螺(Limacinatrochiformis),强卷螺(Agadinasyimpsoni),蝴蝶螺(Desmopterta~papilio),锥笔帽螺(C.virgulavar.comica),棒笔帽螺(C.~la1)a),玻杯螺(Hyalocylizstriata),长吻龟螺(Cavolinialongirostris),芽笔帽螺(Creseisvirgula)和拟海若螺(Paraclionelongicaudata)等l0种为常见种,胖搋螺(Limacinainflata)和皮鳃螺(Pneumodermaatlanticum)等两种为次常见种,其余9种是稀有
3、种.在春季转至夏季,冬季转至春季时,种类组成出现明显的季节更替现象;冬春季种类分布仅受温度变化的影响,而夏秋季则受温度和10nl层或底层盐度变化的共同影响.在冬春季,东海近海由于暖流势力较弱,水温较低,翼足类种数较少,种类数和多样性指数南部大于北部,外海大于近海;从夏季到秋季随着台湾暖流势力的加强,海流将较多的种类带到东海北部和近海,尽管近海种数和多样性指数值仍呈南高北低的特征,但南部和北部,近海和外海的差距明显缩小.关键词:浮游动物,常见种,季节交替,东海SpeciescompositionanddiversityofpteropodsintheEastChinaSeaZh
4、aoliXuKeyandOpenLaboratoryofMarineandEstuaryFisheries,MinistryofAgricultureofChina,EastChinaSeaFisheriesResearchInstitute,ChineseAcademyofFisheriesSciences,Shanghai200090,ChinaAbstract:BasedonthedatafromfouroceanographiccensusesintheEastChinaSea(23.30一33.00N,ll8.30一128.00E)during1997—2000,a
5、ndbymeansofqualitativeandquantitativeparameters.weanalyzedthespeciescomposition,speciesnumber,andspeciesdiversityofpteropodsandtheirrela—tionshipswithenvironmentalfactors.Atotal0f21pteropodsspecieswereobservedintheEastChinaSea,ofwhichCreseisacicula,Linuwinatrochiformis,Agadinasyimpsoni,Desm
6、opteruspapilio,C.virgulavar.comica,Cavolinialongirostris,Creseisvirgula,C.clara,HyalocylizstriataandParaclionelongicau.datawerecommonspecies;LirmwinainflataandPneumodermaatlatrticumweresubordinatespecies:andtheremaining9specieswererare.Accordingtoseasonalalterationrates(R).obviousalternatio
7、nsofpteropodsspeciesoccurredfromspringtosummerandfromautumntowinter.Thespeciesnumberofpteropodspeakedinautumn(20species),followedbysummer(15species)andwinter(14species),andwaslowestinspring(5species).Resultsofregressionanalysisshowedthatthedistributionof
